a = [42, 1, 9, 7]

aa = a.copy()

a.sort()
print(a)

a.sort(reverse=True)
print(a)

a.sort(reverse=False)
print(a)

b = [42, 1, 90, 70]
c = sorted(b)
print(c)

d = sorted(b, reverse=True)
print(d)

d = sorted(b, reverse=False)
print(d)

print(aa)
